There is a unique side to the Traditional Chinese Martial Arts community, and that is trying to claim ownership to know the most authentic and original style of martial arts ever.... A great example of this is when watching a fight or match and then pointing out every single movement that is a part of their style (especially the ones that win). This is not to say that any one punch is unique to a specific style, humans have been hitting each other for much longer than standardized martial arts, so the same punch can exist in multiple arts. It is not the fact that the fighter knows it from whatever background they have, but more importantly, that they knew when to use it in combat. So in the end, what I'm trying to say is, it is your punch, and it is my punch too, no need to claim it to your art.
The other side of this is when practitioners claim other arts as byproducts of their own, boasting that their art is the original style. I come from a background in a relatively young art, barely over 100 years old. I know it's not the first or original Chinese Martial Art so I already stay out of that competition, but I constantly see people arguing over who existed first. Again, our ancestors have been hitting each other for way longer than any of the martial arts we know existed...combined... there is no reason to call shotgun, to be first, it's not a race...
This has been kind of a rant, but in the end I just want it to serve as a reminder that no one owns Kung Fu, no one owns Martial Arts, we're all on our own journeys along this path so why not focus on improving our skill instead of talking about it.